Circuit/System Verification

Ignition ON, verify that no starter relay, clutch pedal position sensor, brake pedal position sensor, theft deterrent, or automatic transmission DTCs are set that would cause the ECM to disable engine starting.
- If DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle
Ignition ON, observe the scan tool BCM Current Power Mode parameter. Place ignition mode switch in the crank position, the parameter should display Crank Request.
- If not the specified value, refer to Power Mode Description and Operation
Ignition ON, observe the scan tool ECM clutch pedal parameter, verify the scan tool parameter displays Applied / Released while depressing and releasing the clutch pedal.
- If the clutch pedal parameter does change. Refer to Clutch Pedal Position Sensor Learn
Transmission range selector in park , verify the scan tool ECM PNP Switch and TCM IMS parameters display Park/Neutral.
- If the TCM IMS parameter does not indicate Park/Neutral. Refer to Transmission Internal Mode Switch Logic
- If the ECM Park/Neutral parameter does not indicate Park/Neutral. Refer to ECM Park Switch Circuit Malfunction .
Transmission range selector in park or neutral, or clutch pedal fully depressed attempt to start the vehicle. The crank relay should click and the engine should begin cranking.
- If the crank relay does not click or the engine does not crank, refer to Crank Relay Circuit Malfunction .
Ignition ON, observe the scan tool ECM Crankshaft Position Sensor Active Counter is not incrementing.
- If the Crankshaft Position Sensor Active Counter is incrementing, replace the Crankshaft Position Sensor.